Cross-multiplication Student activity Play

Cumulative relative frequency Student activity Play

Dalton's atomic theory Animation Play

Definition of density Student activity Play

Democritus' and Dalton's atomic theories Student activity Play

Democritus's atomic theory Animation Play

Density Animation Play

Deriving function from equations Animation Play

Determination of atomic radii Animation Play

Determination of average atomic mass of boron Animation Play

Determination of molecular structure Student activity Play

Determining the atomic radius Animation Play

Determining the composition of atomic nuclei Whiteboard exercise Play

Determining the composition of atomic nuclei Student activity Play

Determining the empirical formula Student activity Play

Determining the empirical formula Whiteboard exercise Play

Determining the molecular formula Animation Play

Determining the proportions of matter in the ecological pyramid Animation Play

Development of atomic theory. Radioactivity Whiteboard presentation Play

Development of atomic theory. Radioactivity Class activity Play

Diffraction of X-rays Student activity Play

Diffraction of X-rays Animation Play

Direct proportion Whiteboard exercise Play

Discovery of the atomic nucleus by Ernest Rutherford Animation Play

Discriminant of the equation ax 2 + bx + c = 0 Student activity Play